SOCIAL AND WORLD ASPECTS 251 



pated or intended. Probably an intelligent and en- 

 lightened public opinion is more efficacious than any 

 laws that could be devised. And a large element of 

 that enlightenment will consist in an understanding 

 of the nature, the laws, and the ubiquity of heredity. 

 However, an obvious negative measure which can 

 be carried into effect is the prevention of reproduction 

 on the part of undesirables, such as the feebleminded. 

 Such measures are necessary, not so much for the 

 improvement of the race, as for arresting its rapid 

 deterioration through the multiphcation of the unfit. 



nOPEKTT UBKART 



